body {
    background-image: url(../img/bgh.jpg);
    background-repeat: no-repeat;
    background-size: 100% 100%;
    background-attachment: fixed;
}

.bn {
    width: 400px;
    margin-top: 160px;
    background: rgba(223, 223, 223, 0.2);
    border-radius: 19px;
    padding: 38px 26px;
}